The Multiquip 11780 is a genuine OEM 45 6MJ-6MO Fitting designed for Whiteman hydrostatic ride-on power trowel models including HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, HTXD6i, STX55J6, STX55Y6, and STXD6i. As a direct OEM replacement, part 11780 meets the original engineering specifications for these machines, ensuring proper hydraulic circuit integrity in the trowel's drive or blade-pitch system. DHS Equipment stocks this part as an authorized Multiquip OEM supplier, so you can order with confidence knowing you're getting the correct component for your machine.
Key Features
- Genuine OEM Hydraulic Specification — Manufactured to the exact thread form and 45-degree angle specification required to maintain leak-free hydraulic connections on Whiteman ride-on trowels.
- Direct-Connect Replacement — The 6MJ-6MO male-to-male configuration matches the original port and line sizing, threading directly into the existing hydraulic circuit without modification.
- Broad HTX and STX Series Compatibility — Confirmed fit across HTX44K4, HTX44K5, HTX44Y4, HTX44Y5, HTXD6i, STX55J6, STX55Y6, and STXD6i trowel models.
- Hydraulic Circuit Integrity — A correctly seated fitting holds system pressure and prevents fluid loss that would otherwise cause sluggish blade pitch response or loss of drive function.
- Fluid System Safety — Hydraulic fittings operating at pressure are a leak point risk; using the OEM-spec 11780 ensures the joint is rated for the system's operating pressure and reduces the risk of uncontrolled fluid release.
A 45-degree hydraulic fitting serves as a directional connector within a machine's hydraulic plumbing, allowing fluid lines to change angle while maintaining a sealed, pressure-rated flow path between components. On hydrostatic ride-on trowels like the HTX44 and STX55 series, hydraulic fittings like this one are critical junction points in the systems that control blade pitch and machine drive. When a fitting cracks, strips, or develops a leak, hydraulic pressure drops, causing erratic or unresponsive control behavior — and a failed fitting should always be replaced with the correct OEM part to preserve the integrity of the full hydraulic circuit.
Part Details
| Part Number | 11780 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | 45 6MJ-6MO Fitting |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX44K4 |
| Whiteman Ride-On Power Trowels | HTX44K5 |
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | HTX44Y4 |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | STXD6i |
| Whiteman Ride-On Power Trowels | HTXD6i |
| Whiteman Ride-On Power Trowels | STX55Y6 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
